This has got to be the easiest recipe ever, so hop to it!
Gluten-Free Crock Pot Applesauce
adapted from Skinny Taste
8 granny smith apples
5 tsp brown sugar
Add the sugar, lemon juice and cinnamon stick.
Set crock pot to low and cook for 6 hours. Stir apples occasionally, apples will slowly become a delicious applesauce. Remove cinnamon stick and use an immersion blender to blend until smooth or your desired consistency. If you don't have an immersion blender then you can use a mixer to get it to the consistency you want, but that will require you moving the cooked apples to a mixing bowl.
Store your applesauce in a jar in the fridge for 3 weeks, or you can use a proper canning method and store for up to a year.